I don't agree with the general approach and opinions
on traditional yeah vs. nayjust because they ( Safety Agency) doesn't
understand,
if the Mfr'r uses it in the right context, and it does not
promote a safety deviaition than it should be accepted...
a concrete reasoning for NOT accepting it
Mark mentioned reports,
a paper trail...or is it?
Vendors doing the EMC/EMI ?,
who might a vendor be for say IBM or Dell?
would think the mfr'r would have an associate
there during testing like most of us do.
Seems it would be easy to look at the report,
from which test lab did it,
are they
would care less about failing by a few db.
the FCC is in place
they run itwe try our best
Richard,
From: drcuthbert [mailto:drcuthb...@micron.com]
Sent: Friday, March 28, 2003 10:54 AM
To: 'Mark Kirincic'; Stone, Richard A (Richard); lfresea...@aol.com;
emc-p...@majordomo.ieee.org
out of the box passed,
thats important,
built and shipped correctly...
once you transport,'
was it packaged the EXACT
same way Geoerge, as you moved it
to site # 2 for the second EMI test.
odds are not...I have been guilty of moving
equipment and seeing a change in emi profile..
alwyas for the
Derek,
doesnt say whether you took the
uncompliant equipment straight from your
lab to another without making any changes...
be interesting to see what the data is,
since PC's are listed to class B...
you may have something..
but its always good to get a second
result from lab B.
Richard,
thats true Earl,
good point on company B, not caring but selling
with a higher profit, less EMC..company A
busting butt to pass and comply with integrity.
as for immunity...
do any PC makers manufacturer any PC's
strictly for sales in USA...only need Emissions here.
that would save 1000's in emc
Brian,
the firewalls exist for many of us,
concerning emailing and free accounts,
your right,its with corporate, not Yahoo..
From: Brian Epstein [mailto:brian.epst...@veeco.com]
Sent: Thursday, March 13, 2003 2:59 PM
To: 'Garnier, David S (MED)'; 'Guy Boone'; emc-p...@majordomo.ieee.org
Subject:
we've had good success with the
built capacitance of 9000pf as well,
depending on test being discussed and
frequency, certain cap. values from the shielded
ring of the UNgrounded ring to earth works well
for low freq.. 30 mhz.
Richard,
From: Knighten, Jim L [mailto:jk100...@teradata-ncr.com]
what the heck does that mean?
was he of the wrong nationality too?
maybe crippled?
From: Daniel Forrest [mailto:daniel.forr...@at.flextronics.com]
Sent: Thursday, February 13, 2003 1:21 AM
To: 'Richard Hughes'; 'Stone, Richard A (Richard)'; 'Brent DeWitt';
emc-p...@majordomo.ieee.org
Subject: RE
its not the fault of a component that
concerns me
For EMI interference,just running normal.,
a very loud radiator could interfere with something
else, wheel chair controller, as mentioned,
thats why testing is critical...now for the fault!
Not an expert,
but a component fault,typically
may
adding to a long screw with additional nuts and wires
is OK, as long as the first lug/wire is tied to chassis
with its dedicated nut, then more can be added,
as long as the first is not disturbed..
Richard,
-Original Message-
From: Gary McInturff
thanks Joe,
many of us share your opinions...
will await more on this subject.
Richard
-Original Message-
From: j...@aol.com [mailto:j...@aol.com]
Sent: Tuesday, September 10, 2002 2:58 PM
To: emc-p...@majordomo.ieee.org
Cc: jfinlay...@telica.com; dorin.op...@alcatel.com;
does anyone know about:
RRL a standard/requirement
in south korea?
what equipment must comply to it?
thank you,
Richard,
-Original Message-
From: richwo...@tycoint.com [mailto:richwo...@tycoint.com]
Sent: Friday, August 30, 2002 12:14 PM
To: emc-p...@majordomo.ieee.org
Subject: RE:
Is this a telecommunications product?
if so, then need DC conducted Emissions
to new EU std. 300386.
Done from 20khz to 30mhz.
If product is ITE, then NO DC cond. is needed.
Richard,
-Original Message-
From: Chris Maxwell [mailto:chris.maxw...@nettest.com]
Sent: Wednesday, January 23,
Does anyone make Class A AND Class B
products?
if so, do you allow for a much smaller margin on the B
since its approx. 10 db quieter than A to start with.
or do you treat them equally.
Also Oats site to Oats site can differ as much as +/- 4 db
do to many factors.
any comments?
Richard,
In typical testing of DC units,
the two inputs are floating
when doing for example: current checks
and hipot to chassis ground.
Yet, in a CO, the return lead is grounded,
so you have a test lab condition ( return floating )
and a real condition, return tied to CO earth ground
in service.
The
Jon,
if your running high etherent freq.
and the shield is NOT grounded,
you might fail class A FCC/Cispr 22.
Richard,
-Original Message-
From: Jon Keeble [mailto:j.kee...@fairlightesp.com.au]
Sent: Wednesday, October 17, 2001 1:05 AM
To: emc-p...@majordomo.ieee.org
Subject: 10/100 base
I would think speed of the energy source
would be a critical factor.
Does anyone have the information
on Surge vs. ESD discharge for
speed of pulse and duration.
Richard,
-Original Message-
From: Chris Chileshe [mailto:chris.chile...@ultronics.co.uk]
Sent: Tuesday, October 02, 2001 6:55
I don't see where that proves anything ( 1/2 voltage testing)
using voltage applicable to product is required.
Testing for one second checks for shorts and miswiring
or spacings that may have been decreased due to workmanship.
Richard,
-Original Message-
From:
Must worry about fire and electrical
enclosure requirments as well.
Depending on levels and components
inside these 94v rating will vary.
Richard,
-Original Message-
From: Doug McKean [mailto:dmck...@corp.auspex.com]
Sent: Monday, August 20, 2001 7:22 PM
To: EMC-PSTC Discussion Group
Don't forget Telco Conducted Emissions is NOT required until
at least 2003'
Richard,
-Original Message-
From: Frazee, Douglas (Douglas) [mailto:dfra...@lucent.com]
Sent: Friday, August 17, 2001 12:19 PM
To: 'Pettit, Ghery'; 'Stuart Lopata'; emc
Subject: RE: CE test suite for computers
Group,
can you substitute one large wire 6 awg. ( handlles 63 amps. max )
for two smaller wires ( 10 awg. carries 32 amps. max. ) in Parallel.
They would 1/2 the current and disperse heat better.
The accepting screw terminal would allow for proper threading and tightness
of connection.
since
You can get NOM exemption by meeting certain criteria
for specialized equipment.
Fast microprocessors,used in special places ( CO's) and not touched
by non-technical people.
this does not give you a NOM mark, but you get a letter
stating its OK to ship into Mexico based on its specialized
concerning -48vdc systems approved to UL 1950.
Are thee any Field Approved quick disconnect connectors ( 2 position )
such as a Amp or Molex mate n'lock?
does anyone know exact requirements to make this mate n' lock a
field approved connector on -48vdc inputs?
thanks
Richard,
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